Ripping attachment for sewing-machines



QN@ ModieL) TALEN RIBP'NGL TTGEMENT FOR SEWING MQAGHNBS.

Nm 663,931. Patented May 10,1898.

ATTORNEYS.

tion of our device thereon.

Nrrnn Srarns MAURICE TALEN AND GEORGE II. CROFT, OF GENESEO, ILLINOIS.

RIPPING ATTACHENT FOR SEWINGJWACHINES.

SPECIFICATION forming part of Letters PtentVNo. 603,931, dated May 10, 1898.

Application led November 23, 1897. Serial No. 659,591. (No model.)

drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a perspective View showing a portion of the sewing-machine and the loca- Fig. 2 :is a side elevation of the device. Fig. 8 is a sectional elevation taken through the frame near the pivot of the cutting-disk, and Fig. 4c is a top plan view of the attachment.

Our device is intended for attachment to the table of a sewing-machine at the point where the belt passes upward through the table. It is attached to the table by Ineans of a clamping-bar B, which has a horizontal arm B secured to the base of the attachment, the body extending downward through the belthole and being secured to the under side of the table by means of a set-screw b.

The base A of the attachment is formed of a plate of metal, having an arm A' extending upwardly from one side thereof, and at the same side a iiange A3, extending upwardly and then turning inwardly, forming a guide to receive the sliding plate D and to securely hold the clamping-bar B. The clamping-bar B may, if desired, be made as a part of the base A, but is preferably made as a separate piece, as it would otherwise necessitate the base being made of heavier metal than is desirable.

Upon the side of the base opposite the flan ge A3 and the arm A is an upwardly-extending flange or web A2, which is provided with a horizontal slot ct. Upon the upper end of the arm A is journaled a roller C, which is adapted to engage the sewing-machine belt.

The plate D is provided witha base D', formed by a flange at right angles to the body` of the plaie and engaging the under surface of the flange A2 upon the base. This plate is adjustably secured against the inner surface of the iiange A2 by means of the clamping-bolt a, which passes through the slot a and is threaded into a hole in the plate D. This plate extends upwardly and has a pulley C journaled upon the saine.

The cutting-disk E is secured to the side of the pulley C or otherwise attached upon the same axis. This pulley C is above the pulley C, and the plate carrying the same may be adjusted so as to vary the relative angular position of the pulleys.

The upper edge of the plate D is curved sidewise, so as to form a guard D2 for the cutting-disk E. At one edge the plate is recessed, as shown at d, exposing a section of the cutting-disk. Upon this edge of the plate and beneath the recess d the edge of the plate :is formed at one side with a liange D3, which is provided with a slot d, embracing the edge of the cutting-disk and formingI a guide or guard for the reception of the material. This edge of the plate is extended downward', forming a leg D4, which engages the top surface of the sewing-machine table.

In using our device the clamping-bar is inserted in the holein the table through which the sewing-machine belt passes, andit is secured in place therein. The belt F is then placed between the pulleys C and C. This furnishes a suflcient contact upon the pulley C to rotate the disk E. As the disk rotates the seam to be ripped is presented to the edge of the disk, when the threads willbe promptly cut. The cutting edge of the disk is protected by the guard-iiange D2, so that there is no -probability of injury to the operator. v

y The relative angular position of the two pulleys may be varied by shifting the plate D upon the base.` As it is thrown toward the left in Fig. 2 it will cause a greater bend to be made in the belt, which will insure alarger are of contact and at the same time increase the tension of the belt, thus furnishing an increased driving power when needed. The leg D4, engaging the table-top, willfurnish a iirm bearing for this end of the plate.

The device is simple and cheap in construc- IOO tion and may be readily attached to or detached from any ordinary sewing-machine. By its means seams may be rapidly ripped without danger to the operator or of cutting the cloth.

Having thus fully described our invention, we claim as new and desire to secure by Letters Patentl. A ripping attachment for sewing-machines, comprising a base plate separate from and attachable to the sewing-machine table, and having two pulleys supported therefrom and adapted to receive the sewingmachine belt between them, and a rippingdisk connected with one of said pulleys, substantially as described.

2. A ripping attachment for sewing-machines, comprising a base plate separate from and attachable to the machine-table, and having two pulleys supported therefrom at different elevations and adapted to receive the belt between them by deflecting the belt, one of said pulleys being movable horizontally, and a cutting-disk connected to one of the pulleys, substantially as described.

3. A ripping attachment for sewing-machines, comprising a base plate separate from and attachable to the machine-table and having a pulley mounted thereon, a plate adj ustable horizontally upon the base-plate and having a pulley mounted thereon above the other pulley, and a cutting-disk connected to one of the pulleys, substantially as described.

4:. A ripping attachment for sewing-machines, comprising a base attachable to the machine-table and having a pulley mounted thereon, a plate adjustable horizontally upon the base and having a pulley mounted thereon above the other pulley, said plate having its upper portion curved over to form a shield for the edge of the cutting-disk, and a cutting-disk mounted upon the shaft of the second pulley, substantially as described.

5. A ripping attachment for sewingmachines, comprising a base attachable to the machine-table and having a pulley mounted thereon, a plate adjustable upon the base and having a pulley mounted thereon above the other pulley, said plate having its upper Lfiortion curved over to form a shield for the edge of the cutting-disk, and its front edge bent laterally and slotted to embrace the disk and form a work support or guide, substantially as described.

6. A ripping attachment for sewing-machines, comprising a base having an upwardly-extending arm on one side carrying a roller thereon, the same edge of the baseplate being curved upwardly and inwardly to form a guide-iange, and an upwardly-extending flange or web upon the other side having a horizontally-extending slot therein, means for securing the base to the table, a plate lying alongside of the slotted web of the base and having a base-lange engaging beneath the guide-flan ge of the base, a pulley and connected cutting-disk journaled on said plate above the other pulley, said plate also having its upper edge rolled over the edge of the disk to form a guard therefor, and a recess at one side exposing a section of the disk, substantially as described.

7. A ripping attachment for sewing-machines, comprising a base having an upwardly-extending arm on one side carrying a roller, the saine edge of the base-plate being curved upwardly and inwardly to form a guide-flange, and an upwardlyextending flange or web upon the other side having a horizontally-extending slot therein, means for securing the base to the table, a plate lying alongside of the slotted web of the base and having a base-flange engaging beneath the guide-flange of the base and a leg engaging the machine-table beyond the belt, a pulley and connected cutting-disk journaled on said plate above the other pulley, said plate having a recess at one side exposing a section of the disk, and a bolt passing through the slot in the base-plate and entering the sliding plate whereby the two may be adjusted, substantially as described.

8. A ripping attachment for sewing-machines, comprising a base having an upwardly-extending arm on one side carrying a roller, said base being bent upwardly and inwardly to form a guide on the same side of the base, and an upwardly-extending flange or web upon the other side having a horizontally-extending slot therein, a clam ping-arm extending downward from said base and adapted to pass through the bolt-hole in the machine-table, a plate lying alongside of the slotted web of the base and having a baseflange engaging beneath the guide-{iange of the base, and a leg engaging the machine-table beyond the belt, a bolt passing through the slot in the base-plate and into the sliding plate, a pulley and connected cutting-disk journaled in said plate above the other pulley, said plate also having its upper edge rolled over the edge of the disk to form a guard therefor, a recess at one side exposing a section of the disk, and a side extending liange at the lower part of the said recess, said iiange being slotted to embrace the disk and forming a work guide or support, substantially as described.

9. The combination in a ripping device, of a base-plate, two pulleys mounted to rotate thereon and adapted to receive a belt between them, and a cutting-disk connected with one of said pulleys, with a sewing-machine having a table-top, means for securing the baseplate thereto with its pulleys in line with the belt, the belt-pulleys, and their operating means, substantially as described.

MAURICE TALEN. GEORGE H. CROFT. Vitnesses:

WM. ZIMMERMAN, F. C. ZIMMERMAN.

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